Dynamical Formation of Scalarized Black Holes and Neutron Stars through Stellar Core Collapse

Abstract

In a certain class of scalar-Gauss-Bonnet gravity, the black holes and the neutron stars can undergo spontaneous scalarization -- a strong gravity phase transition triggered by a tachyonic instability due to the nonminimal coupling between the scalar field and the spacetime curvature. Studies of this phenomenon have, so far, been restricted mainly to the study of the tachyonic instability and stationary scalarized black holes and neutron stars. To date, no realistic physical mechanism for the formation of isolated scalarized black holes and neutron stars has been proposed. We study, for the first time, the spherically symmetric fully nonlinear stellar core collapse to a black hole and a neutron star in scalar-Gauss-Bonnet theories allowing for a spontaneous scalarization. We show that the core collapse can produce scalarized black holes and scalarized neutron stars starting with a nonscalarized progenitor star. The possible paths to reach the end (non)scalarized state are quite rich leading to interesting possibilities for observational manifestations.

9 pages, 10 figures; accepted in PRL. This version is based on fully nonlinear simulations beyond the decoupling limit

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Cited by in corpus (27)

• Spontaneous scalarization
• The Science of the Einstein Telescope
• Nonlinear studies of binary black hole mergers in Einstein-scalar-Gauss-Bonnet gravity
• Dynamical descalarization with a jump during black hole merger
• Spontaneous nonlinear scalarization of Kerr black holes
• Nonperturbative gedanken experiments in Einstein-dilaton-Gauss-Bonnet gravity: nonlinear transitions and tests of the cosmic censorship beyond General Relativity
• Neutron stars in massive scalar-Gauss-Bonnet gravity: Spherical structure and time-independent perturbations
• Spontaneous Scalarization of Black Holes in Gauss-Bonnet Teleparallel Gravity
• Constraining scalarization in scalar-Gauss-Bonnet gravity through binary pulsars
• Dynamical scalarization in Einstein-Maxwell-dilaton theory
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• Compact Objects in Alternative Gravities
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• Rapidly Rotating Neutron Star Collapse in Massive Scalar-Tensor Theories
• Scalarized Black Holes
• Black hole sensitivities in Einstein-scalar-Gauss-Bonnet gravity
• Radial perturbations of scalar-Gauss-Bonnet black holes beyond spontaneous scalarization
• The ghost of vector fields in compact stars